﻿Shader "Custom/NewSurfaceShader" {
	Properties {
		_Color ("Color", Color) = (1,1,1,1)
		_MainTex ("Albedo (RGB)", 2D) = "white" {}
		_Glossiness ("Smoothness", Range(0,1)) = 0.5
		_Metallic ("Metallic", Range(0,1)) = 0.0
	}
	SubShader {
	    Pass{
            Tags { "RenderType"="Opaque" }
            LOD 200
            
            CGPROGRAM
            // Physically based Standard lighting model, and enable shadows on all light types
            #pragma surface surf Standard fullforwardshadows
    
            // Use shader model 3.0 target, to get nicer looking lighting
            #pragma target 3.0
    
            sampler2D _MainTex;
    
            struct Input {
                float2 uv_MainTex;
            };
    
            half _Glossiness;
            half _Metallic;
            fixed4 _Color;
    
            // Add instancing support for this shader. You need to check 'Enable Instancing' on materials that use the shader.
            // See https://docs.unity3d.com/Manual/GPUInstancing.html for more information about instancing.
            // #pragma instancing_options assumeuniformscaling
            UNITY_INSTANCING_CBUFFER_START(Props)
                // put more per-instance properties here
            UNITY_INSTANCING_CBUFFER_END
    
            void surf (Input IN, inout SurfaceOutputStandard o) {
                // Albedo comes from a texture tinted by color
                fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
                o.Albedo = c.rgb;
                // Metallic and smoothness come from slider variables
                o.Metallic = _Metallic;
                o.Smoothness = _Glossiness;
                o.Alpha = c.a;
            }
            ENDCG
		}
		
       // shadow caster rendering pass, implemented manually
        // using macros from UnityCG.cginc
        Pass
        {
            Tags {"LightMode"="ShadowCaster"}

            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #pragma multi_compile_shadowcaster
            #include "UnityCG.cginc"

            struct v2f { 
                V2F_SHADOW_CASTER;
            };

            v2f vert(appdata_base v)
            {
                v2f o;
                TRANSFER_SHADOW_CASTER_NORMALOFFSET(o)
                return o;
            }

            float4 frag(v2f i) : SV_Target
            {
                SHADOW_CASTER_FRAGMENT(i)
            }
            ENDCG
        }		
		
	}
	FallBack "Diffuse"
}
